M000000145

$$\pi=2476996\arctan\left(\frac{1}{1059193}\right)+117852\arctan\left(\frac{2}{5336461}\right)+1401144\arctan\left(\frac{1}{3449051}\right)+3070476\arctan\left(\frac{2}{16840821}\right)-555712\arctan\left(\frac{1}{18975991}\right)-245604\arctan\left(\frac{1}{24185182}\right)-177804\arctan\left(\frac{1}{54610269}\right)+1842840\arctan\left(\frac{1}{100656977}\right)+2655376\arctan\left(\frac{1}{201229582}\right)-1035508\arctan\left(\frac{1}{909140573}\right)+278228\arctan\left(\frac{2}{4532659739}\right)+877184\arctan\left(\frac{2}{6223926959}\right)-2008692\arctan\left(\frac{1}{18986886768}\right)$$